At Sāvatthī.

Seated to one side, that mendicant said to the Buddha:

“Sir, they speak of this thing called ‘knowledge’. What is knowledge? And how is a knowledgeable person defined?”

“Mendicant, it’s when an educated noble disciple understands form, its origin, its cessation, and the practice that leads to its cessation. They understand feeling … perception … choices … consciousness, its origin, its cessation, and the practice that leads to its cessation.

This is called knowledge. And this is how a knowledgeable person is defined.”